Toolholder



July 5, 1949. s. D. MERCEP I I 2,474,907

' TOOLHOLDER 'Filed April 27, 1945 a Sheets-Sheet 1 INVENTOR. SPIRO D. FIERcEp BY g I July 5, 1949. MERCEP 2,474,907

TOOLHOLDER Filed April 27, 1945 3 Sheets-Sheet 2 IN VEN TOR.

'Spl o D. MERCEP wim July 5, 1949. s. D. M ERCVEIP 2,474,907

TOOLHOLDER Filed April 27, 1945 5 Sheets-Sheet 3 INVENTOR. 5 PIRO D. NE cEP Patented July 5, 1949 UNITED STATES PATENT OFFICE TOOLHOLDER Spiro D. Mercep, New York, N. Y. Application April 27, 1945, Serial No. 590,662

6 Claims.

This invention relates to new and useful improvements in an adjustable holder for engine lathes and shapers.

More particularly, the invention proposes an adjustable holder adapted for engine lathes and shapers by which it is possible to internally bore. and cut key-ways on these machines.

The dominating advantage of the adjustable holder resides in the fact that with the holder it is possible to use a lathe for boring various sizes of openings. It is proposed that the adjustable holder be provided with a holder cylinder which may be adjusted upward and downward for controlling the point of boring, or cutting.

Still further the invention proposes to characterize the new holder for engine lathes and shapers, by the fact that it includes a shank which may be mounted upon the lathe or shaper in the usual way in which a cutting tool is mounted on this machine, It is proposed to provide the shank with a slide type of head. A hollow holder cylinder having a chord-like groove complementary to the slide type head engages said slide type head, by which the cylinder can be adjusted on the shank. It is proposed to provide means for locking the cylinder in adjusted positions on the slide type of head. A bushing is mounted through the cylinder, and is associated with means for holding a boring or cutting tool in position.

Still further the invention proposes the construction of an adjustable holder as mentioned which is simple and durable, and which may be manufactured and sold at a reasonable cost.

For further comprehension of the invention, and of the objects and advantages thereof, reference will be had to the following description and accompanying drawings, and to the appended claims in which the various novel features of the invention are more particularly set forth.

In the accompanying drawings forming a material part of this disclosure:

Fig. 1 is a perspective view of an adjustable holder for engine lathes constructed in accordance with this invention.

Fig. 2 is an end elevational view of an adjustable holder for an engine lathe, illustrated mounted on the shank holder for such a machine.

Fig. 3 is a plan view of Fig. 2.

Fig. 4 is a perspective view of the bushing and tool holding means shown in Figs. 2 and 3.

Fig. 5 is a sectional view taken on the line 5--5 of Fig. 4.

Fi 6 i a s de e e et onel view of a bushing 2 and tool holding means for use in the adjustable holder, but constructed in accordance with a modified form of this invention.

Fig. '7 is a transverse sectional view taken on the line 1-'l of Fig. 6.

Fig. 8 is a fragmentary enlarged detailed View of a portion of Fig. 7.

Fig. 9 is a perspective view of an adjustable holder for shapers constructed in accordance with another form of this invention.

Fig. 10 is an end elevational view of still another adjustable holder for engine lathes constructed in accordance with still another form of the invention.

Fig. 11 is a plan view'ofFig. 10..

Fig. 12 is a perspective view of a clamp rod used in Figs. 10 and 11.

The adjustable holder for engine lathes, in accordance with this invention, includes a shank [0 having a slide type of head II. This shank It! is of the usual form to adapt it to be mounted in the tool holding means of a lathe. A hollow cylinder I4 is provided with a chord-like groove l5 by which the cylinder I4 is adjustably mounted on the head H so as to be capable of assuming various adjusted positions, upward and downward with relation to the shank Ill. The cylinder [4 is associated with means by which it may be locked in adjusted positions on the head II. This means comprises several set screws l6 threadedly engaged through the ends of the cylinder l4 and abutting side portions of the head II.

The cylinder I4 is formed with an opening I8, which is in the nature of a bore, and through which a rod, or tool l9 passes. This opening I8 is arranged eccentric to the cylinder M, as clearly shown in Fig. 2. A bushing 29 is engaged through the bore l8. This bushing 20 has a head 2| formed at one end, which engages against one end of the cylinder 14. The head 2i is knurled so that it may be easily gripped. A nut 22 is threadedly mounted upon the other end of the bushing 20, and when screwed down tight, engages against the other end of the cylinder IQ for fixedly holding the bushing 20 in position on the cylinder I l. The nut 22 is also knurled to facilitate gripping.

The bushing 20 is associated with means for holding the rod l9, or the boring or cutting tool.

This means includes a clamp member 25 pivotally supported on one side by a pintle pin 26, see Figs. 4 and 5, so that it may swing open as schematically indicated by the dot and dash lines 25' in Fig. 4. This clamp member 25 is curved to fit in with the curvature of the bushing 20. It is set into an opening 28 formed through the side wall of the bushing 20. A set screw 29 is threadedly engaged through the top of the hollow cylinder l4 and normally abuts the clamp member by which the clamp member may be firmly engaged against the rod, or tool [9.

A wrench 30 is ilustrated engaging the set screw 29 in Figs. 1 to 3, illustrating the manner in which the set screw may be firmly engaged against the clamp member 25. A top portion of the cylinder I4 is cut out, or recessed to form a shoulder 32 into which the set screw 29 is mounted.

The set screws I 6 may be loosened with the wrench 30, and then the cylinder l4 may be adjusted upward or downward to various positions. Similarly the set screw 29 may be loosened, then the rod, or tool l9 may be moved forward or rearward, or turned to various positions. The holder for the rod or tool l9 may be mounted in the usual tool holding device of a lathe, so that the tool may be used for boring, or other operation.

In Figs. 6 to 8, a modified form of the invention has been disclosed which distinguishes from the prior form merely in the construction of the mechanism which operates the clamp member 25 of the bushing 20. In accordance with this form of the invention the clamp member 25 is pivotally supported along one side with a pintle pin 26. However, the other side of the clamp member 25 is formed with a groove 34 through which a clamp rod 35 passes. The clamp rod 35 is turnably mounted through the bushing 20. It is provided with a hexagonal head 36 at one end of the bushing 20 by which it may be turned. A tubular cam 31 is fixedly mounted on the clamp rod 35 and is disposed within the groove 34. When the head 36 of the clamp rod 35 is turned the cam 31 will be correspondingly turned, and because of its cam construction (it is eccentric in relation to the rod 35) will press against the bottom of the groove 34 and force the clamp member 25 against the rod 19, or tool.

In other respects this form of the invention is identical to the prior form and like parts may be recognized by the same reference numerals.

In Figs. 10 to 12 inclusive, still another form of the invention has been disclosed, which distinguishes from the prior forms in the way that the clamp member 25 is urged into clamping position. There is a clamp rod which is vertically turnably mounted through the cylinder Id. The top and bottom ends of the clamp rod are turnably supported by bushings These bushings M are set into recesses, or cutouts 42 formed in the top and bottom of the cylinder I4. One of the ends of the clamp rod is provided with a projecting square portion 43 upon which a turn ing tool may be engaged for turning the clamp rod. The clamp rod 40 is provided with a central cam, or eccentric portion 44 which is adapted to engage against the clamp member 25 to force the clamp member 25 against the rod I9, or tool for firmly holding it in position.

In other respects this form ofthe invention is identical to the first form of the invention and like parts may be recognized by identical reference numerals.

The operation of the new and improved adjustable holders for engine lathes and shapers may be understood from the following:

The holders are mounted on lathes or shapers in the usual way in which cutting tools are mounted on lathes or shapers. However, the

cutting tools are engaged through the bushings 2B and are securely locked in adjusted positions, as required to do a boring or other cutting job on a lathe or shaper. The cylinders I4 may be adjusted upward and downward on the heads I! to properly locate the cutting tools. The cutting tools may be placed in various extended or retracted positions.

While I have illustrated and described the preferred embodiments of my invention, it is to be understood that I do not limit myself to the precise constructions herein disclosed and the right is reserved to all changes and modifications coming within the scope of the invention as defined in the appended claims.

Having thus described my invention, what I claim as new, and desire to secure by United States Letters Patent, is:

1. An adjustable holder for engaging lathes and shapers, comprising a shank having a slidetype of head, a hollow cylinder having a chordlike groove complementary to and engaging said slide type head by which said cylinder is adjustable on said head, means for locking said cylinder in adjusted positions on said head, a bushing mounted through said hollow cylinder, and means mounted on said bushing for holding a boring tool, or cutting tool, in position, comprising a clamp member adjustably mounted on said bushing, said clamp member being pivotally mounted.

2. An adjustable holder for engine lathes and shapers, comprising a shank having a slide-type of head, a hollow cylinder having a chord-like groove complementary to and engaging said slide type head by which said cylinder is adjustable on said head, means for locking said cylinder in adjusted positions on said head, a bushing mounted through said hollow cylinder at right angles to said groove and formed with an opening in one side, a clamp member disposed within said opening, a pin for pivotally supporting said clamp member along one side, and releasable means for holding the other side of said clamp member to clamp a boring or cutting tool in position in said bushing.

3. An adjustable holder for engine lathes and shapers, comprising a shank having a slide-type of head, a hollow cylinder having a chord-like groove complementary to and engaging said slide type head by which said cylinder is adjustable on said head, means for locking said cylinder in adjusted positions on said head, a bushing mounted through said hollow cylinder, and means mounted on said bushing for holding a boring tool, or cutting tool in position, comprising a clamp member mounted on one side of said bushing, a pin for pivotally supporting said clamp member along one side, and releasable means for holding the other side of said clamp member, said means including a clamp rod.

4. An adjustable holder for engine lathes and shapers, comprising a shank having a slide-type of head, a hollow cylinder having a chord-like groove complementary to and engaging said slide type head by which said cylinder is adjustable on said head, means for locking said cylinder in adjusted positions on said head, a bushing mounted through said hollow cylinder, and means mounted on said bushing for holding a boring tool, or cutting tool in position, said means for holding a tool comprising a clamp member, and a rod rotatively mounted through said cylinder and having an eccentric cam portion engageable against said clamp member.

5. An adjustable holder for engine lathes and shapers, comprising a shank having a slide-type of head, a hollow cylinder having a chord-like groove complementary to and engaging said slide type head by which said cylinder is adjustable on said head, means for locking said cylinder in ad- J'usted positions on said head, a bushing mounted through said hollow cylinder at right angles to said groove and formed with an opening in one side thereof, a clamp member disposed within said opening, a rod rotatively mounted through said cylinder, and an eccentric cam portion on said rod engageable against said clamp member, said rod being turnably supported in said cylinder and said cam portion being disposed in a groove formed in said clamp member. 6. An adjustable holder for engine lathes and shapers, comprising a shank having a slide-type of head, a hollow cylinder having a chord-like groove complementary to and engaging said slide type head by which said cylinder is adjustable in said head, means for locking said cylinder in adjusted positions on said head, a bushing mounted through said hollow cylinder, at right angles to said groove, a clamping member engaged 6 through the side of said bushing, a pintle pin pivotally supporting said clamping member along one side, a groove formed in the other side of said clamping member, and a clamping rod with a clamping cam engaging in said groove by which the clamping member may be set into clamping position to secure a cutting or boring tool in position in said bushing.

'SPIRO D. MERCEP.

REFERENCES CITED The following referenlces are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 600,747 Severson Mar. 15, 1898 735,138 Normand Aug. 4, 1903 968,776 Leavitt Aug. 30, 1910 1,293,792 Himerson Feb. 11, 1919 1,509,677 Lees Sept. 23, 1924 FOREIGN PATENTS Number Country Date 143,190 Germany Aug. 15, 1903 

